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UID:node-415@cns.ceu.edu
DTSTAMP:20180215T131500Z
DTSTART:20180215T131500Z
DTEND:20180215T141500Z
SUMMARY:Falling Fertility Creates Trust Gap: Changing Social Network Structure in Demographic Transition
DESCRIPTION: ABSTRACT | Traditional human societies use two of biology’s solutions to reduce free-riding: by collaborating with relatives, they rely on kin-selection mechanism, and by forming highly clustered social kin-networks, they can efficiently depend on reputation dynamics. However, both of these solutions assume the presence of relatives. This paper’s model shows how social networks change during demographic transition. With falling fertility, there are fewer children that could be relatives to each other. As the missing kin is replaced by non-kin friends, local clustering in the social network drops. This effect is compounded by increasing population size, characteristic of demographic transition. At the same time, with falling fertility the average graph distance decreases, ballooning the set of indirect social contacts two-steps away. A second model shows that the speed at which reputation spreads in the network slows down due to both falling fertility and increasing group size. Thus the demographic... - http://cns.ceu.edu/events/2018-02-15/falling-fertility-creates-trust-gap-changing-social-network-structure-demographic
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